Flynn, a charming Irish surname, is still used only quietly, despite its easygoing, casual cowboy charm, unlike Finn which is a star of this genre. Flynn was the choice of Orlando Bloom and Miranda Kerr for their baby boy, and is also the middle name -- used as his first -- of a son of Miranda's fellow supermodel Elle Macpherson, of Gary Oldman's son Gulliver and Marley Shelton's daughter West.

Quinn is an engaging Celtic surname, zippy, concise and strong. While it may now lean feminine in the US, given to girls about 80% of the time, it is still given to a substantial number of boys: 615 in a recent count.

Callahan, the simpler spelling of Callaghan, is a rhythmic jig of a name whose history harks back to the ancient King of Munster. In the Dirty Harry movies, the Clint Eastwood character is Harry Callahan.

Leif is one of the most recognizable Scandinavian names, thanks to Icelandic explorer Leif Erikson, and is still one of the best, with a pleasant aural association with the word leaf.

In the past few years Ellery has gone from middle-aged male detective -- from old school fictional hero Ellery Queen -- to a plausible girls' name, a la Hillary.

Troy shot to popularity as a first name in tandem with that of 1960s heartthrob Troy (born Merle) Donahue; its image has now, thanks in part to the Brad Pitt-starring epic, Troy, receded back to conjuring up the ancient site of the Trojan wars.

This evocative green nature name, heard much more frequently as a surname, is associated with playwright Moss Hart (born Robert), who co-wrote (with George S. Kaufman) such enduring Broadway comedies as The Man Who Came to Dinner and You Can't Take it With You.

The great sax player John Coltrane could be a cool naming inspiration for a jazz fan. Plus, it gives you stylish nickname Colt, if you didn't love Colton or Colter.

Halloran could be your solution if you love the nickname Hal, but not Harold or Henry.

Brenna is a feminine form of the Irish surname Brennan, or perhaps a variation of Brenda or Brendan—all of which have different meanings. Whatever its derivation or authenticity, it's a modern sounding name which has steadily decreased in popularity since 1995 when it peaked at Number 235 in the United States.

Ellery is a rhythmic three-syllable boy's name that is familiar and yet rarely used--and just waiting to be discovered. It's long been identified with Ellery Queen--which was both the pen name of two cousins, Frederic Dannay and Manfred B. Lee, and the detective they created.

An Irish last-name-first-name that could make a child feel distinctive, while still having the regular guy nickname of Quinn. Christine Taylor and Ben Stiller spelled their son's name Quinlin.

Although it looks like an English placename, the surname Crowley is an anglicization of the Irish O Cruadhlaoich. A famous bearer was the occultist Aleister Crowley, and it also appears on characters in Supernatural and The Walking Dead. It has started to get a little use in recent years, as part of the new wave of names ending in -ley.

When British rocker Steven Patrick Morrissey decided to use his last name alone, it became a viable option for baby namers, a lot cooler than Morris or Maurice, with the nice three-syllable lilt of of such other Irish surnames as Finnegan and Flanagan. It can also be spelled Morrisey.

A winning last-name-first Celtic choice, Flynn is still mostly used for boys, such as the son of Orlando Bloom and Miranda Kerr. Though Flynn is definitely one of the Irish surname names, from Quinn to Flannery to Makenna, that makes one of the trendy boy names for girls".

Gallagher is, like so many of its genre, friendly, open, and optimistic. Some might associate it with the fraternal members of the band Oasis, Noel and Liam Gallagher.

Long before the vogue of using Irish surnames for girls, writer Flannery O'Connor gave this one some visibility. It has a warm (flannelly) feel and the currently popular three-syllable ee-ending sound.

Curran is a common surname in Ireland, but unusual even there as a first. With its savory feel, calling to mind curry and currants, Curran can make for an attractive update on Colin or Connor.

Also spelled Aulay in Scotland, this is an attractive form of the Scandinavian name Olaf that blends several currently fashionable sounds.

Kennelly could be an upbeat modern namesake for a Grandpa Kenneth; it can also be spelled Kenneally.